Valves on the process pipelines at the inlet and outlet of the heat exchanger
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In a certain acidic water pipeline leading to the regeneration tower, the temperature was a bit low; therefore, a steam heater was installed to heat the water with low-pressure steam before it entered the tower. When working with PID control in the process engineering field, shut-off valves are installed at both the inlet and outlet of the acidic water pipeline of the steam heater. Is it necessary to have such shut-off valves when there is no bypass for the acidic water pipeline?
Without a bypass, what’s the point of installing a shut-off valve? Can the system operate with the shut-off valve closed during maintenance?
Is it possible without a heat exchanger? If possible, avoid using valves; in that case there will be no need for a heat exchanger. Of course, since heat exchangers often break down or something, it’s possible to add a bypass
The process engineers also suggested the same thing; in fact, the heat exchanger is merely a preventive measure, and there is no need to add a bypass.